If he leans slightly farther back (increasing the angle between his body and the vertical) but remains stationary in this new position, which of the following statements is true? Assume that the rope remains horizontal, (a) The difference between T 1 and T 2 will increase, balancing the increased torque about his feet that his weight produces when he leans farther back; (b) the difference between T 1 and T 2 will decrease, balancing the increased torque about his feet that his weight produces when he leans farther back; (c) neither T 1 nor T 2 will change, because no other forces are changing; (d) both T 1 and T 2 will change, but the difference between them will remain the same.
If he leans slightly farther back (increasing the angle between his body and the vertical) but remains stationary in this new position, which of the following statements is true? Assume that the rope remains horizontal, (a) The difference between T 1 and T 2 will increase, balancing the increased torque about his feet that his weight produces when he leans farther back; (b) the difference between T 1 and T 2 will decrease, balancing the increased torque about his feet that his weight produces when he leans farther back; (c) neither T 1 nor T 2 will change, because no other forces are changing; (d) both T 1 and T 2 will change, but the difference between them will remain the same.
If he leans slightly farther back (increasing the angle between his body and the vertical) but remains stationary in this new position, which of the following statements is true? Assume that the rope remains horizontal, (a) The difference between T1 and T2 will increase, balancing the increased torque about his feet that his weight produces when he leans farther back; (b) the difference between T1 and T2 will decrease, balancing the increased torque about his feet that his weight produces when he leans farther back; (c) neither T1 nor T2 will change, because no other forces are changing; (d) both T1 and T2 will change, but the difference between them will remain the same.
Consider the person lifting a heavy box with his back, shown in Figure The mass of the upper body is 55.0 kg and the mass of the box is 30.0 kg. Calculate the magnitude and direction of the force FV – exerted by the vertebrae on the spine at the indicated pivot point. Again, data in the figure may be taken to be accurate to three significant figures.
Scientists have studied how snakes grip and climb ropes. In one study, they found that an important characteristic of a rope is its “compliance”— that is, how easily the rope, while under tension, can be flexed. As shown how scientists measured a rope’s compliance by attaching it to two strings, each supporting an identical mass m. The strings contort the rope so that its middle section lies at angle θ. For θ = 30° and m = 100 g, what are the tensions T1 and T2 in the upper and middle parts of the rope?
In this experiment, if, say 20 kg are placed on the left side, can the plank be balanced with only 10 kg on the right side?
Group of answer choices
1-Yes, if the 10 kg are as far from the fulcrum as the 20 kg.
2-Yes, if the 10 kg are placed half as far from the fulcrum as the 20 kg.
3-No, because then the sum of torques will not be zero
4-Yes, if the 10 kg are placed twice as far from the fulcrum as the 20 kg.
5-No, because then the sum of forces will not be zero
One of the conditions for equilibrium is that the sum of torques must be zero. Suppose that the plank is in equilibrium with some weights on it. The torque about the fulcrum will be zero. Will the torque calculated about the left edge of the plank also be equal to zero?
Group of answer choices
1-Yes
2-It may or may not be.
3-No
Suppose that the plank has a mass 15 kg, and we place 10 kg on the left side at a distance 2.00 m from the fulcrum, and a mass 20 kg on the right side at a distance 1.00 m…
Chapter 11 Solutions
University Physics with Modern Physics, Books a la Carte Edition (14th Edition)
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